Sylvania



W' i ,gime @a weeeeaew tenti@ W. T.JAQUITH AND ROBE RT VCALHOUN-,orALLEGHENY,

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Letters Patent No. 92,453, dated .Tu-ly 13, 1869.

IMPROYED SASH-CORD SHEA'V'E.

The Schedule referred to in these LettersvPz-ltent and making part kofthe same.

Be it known that we, ROBERT CALHOUN and \V. T. JAQUiTH, ofthe city ot`Allegheny, aud State of Pennsylvania, have invented a new and improvedSash-Cord Sheave; andwe do hereby declare that the bllowing is a fulland cxact description thereof, reference being had to the accompanyingdrawings, and to the letters of reference marked thereon.

The nature of our inventionconsists in providing a cheap, durable, andcomplete cord-sheave, made of glass, porcelain, or any other smooth,hard substance, easily adjusted, and not liable toget out of order.

To enable others skilled in the art to make and use our invention, wewill proceed to describe the same.

Figure l representsour sheave, which, in nature, is a cylindrical pieceof glass, porcelain, or other hard substance, flattened on either end,and perforated by a hole, B, through the same, from end to end, thehottom of which is grooved to allow of the free passage ofthe cord, asshown in the drawing.

Figure 2 shows a section of window-casing C C; end ot our sheave iuplace, A A; and section of cord 1) The sheaveis made with exteriorlongitudinal cor rugations, as shown in iig. l, by which it is held morefirmly in place when inserted in the casing` 0c, The mortise in whichthe sheave A is inserted, isl made, as near as may be, of the exactshape of the sheave, so that when the sheave is inserted, the edge ofthe mortise will be cased by the sheave all around, so as to make aneat, complete, and finished joint in all parts. We are awarethat/wiudow-,sash sheaves have been made cylindrical in shape, exceptthat a groove, f

Witnesses CHARLES CALHOUN, B. LOUTHER.

